Définition
Creatine is an amino acid derivative stored in muscle as phosphocreatine, used to rapidly regenerate ATP during high-intensity effort. It is one of the most studied and effective supplements ever researched — improving strength, muscle mass, cognitive function, and increasingly recognized as particularly valuable for women.
Creatine is naturally synthesized in the liver and kidneys from the amino acids glycine, arginine, and methionine. It is stored primarily in skeletal muscle (95%) as phosphocreatine, where it serves as a rapid ATP donor — regenerating ATP in seconds during high-intensity muscular effort. The brain also uses creatine, with smaller pools supporting neuronal ATP demands.
The evidence base on creatine is vast and consistent. For muscle: 3–5g daily produces measurable increases in strength, power output, lean mass, and recovery across hundreds of trials. For the brain: creatine supplementation improves cognitive performance under stress (sleep deprivation, mental fatigue, hypoxia) and may support mood. Women typically have lower muscle creatine stores than men (about 70–80% of male levels), which may make them more responsive to supplementation.
The form matters less than marketing suggests — creatine monohydrate has the most research, highest bioavailability confirmed by direct measurement, and is dramatically cheaper than alternative forms like HCL, buffered creatine, or creatine ethyl ester. The gold-standard protocol is simple: 3–5g daily, taken any time (no need to time around workouts), with water. No loading phase is required for long-term benefit; steady-state saturation is reached in 3–4 weeks.
For women in perimenopause and beyond, creatine addresses two simultaneously relevant problems: accelerating sarcopenia (age-related muscle loss) and cognitive changes. The 2021 Nutrients review by Smith-Ryan et al. specifically advocated for creatine as an underutilized tool for women across the lifespan, with specific benefit during the menopausal transition. Safety data in long-term use is strong; the common concerns about kidney stress are not supported in individuals with normal renal function.
Termes associés
Ava Longevity · Built on the Ava Method · MMXXV